import React, { useState } from 'react'
import { Link, useNavigate, useLocation } from 'react-router-dom'
import { useDispatch, useSelector } from 'react-redux'
import { useForm } from 'react-hook-form'
import { zodResolver } from '@hookform/resolvers/zod'
import { z } from 'zod'
import { useTranslation } from 'react-i18next'
import { EyeIcon, EyeSlashIcon } from '@heroicons/react/24/outline'
import { AppDispatch } from '@/store'
import { login, selectAuthLoading, selectAuthError, clearError } from '@/store/slices/authSlice'
import toast from 'react-hot-toast'

const loginSchema = z.object({
  email: z.string().email('Please enter a valid email address'),
  password: z.string().min(6, 'Password must be at least 6 characters'),
})

type LoginFormData = z.infer<typeof loginSchema>

export const LoginPage: React.FC = () => {
  const { t } = useTranslation()
  const navigate = useNavigate()
  const location = useLocation()
  const dispatch = useDispatch<AppDispatch>()
  const isLoading = useSelector(selectAuthLoading)
  const error = useSelector(selectAuthError)
  const [showPassword, setShowPassword] = useState(false)

  const from = location.state?.from?.pathname || '/developer'

  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm<LoginFormData>({
    resolver: zodResolver(loginSchema),
  })

  const onSubmit = async (data: LoginFormData) => {
    try {
      dispatch(clearError())
      const result = await dispatch(login(data))
      
      if (login.fulfilled.match(result)) {
        toast.success('Welcome back!')
        navigate(from, { replace: true })
      } else {
        toast.error(result.payload as string || 'Login failed')
      }
    } catch (err) {
      toast.error('An unexpected error occurred')
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-gray-50 py-12 px-4 sm:px-6 lg:px-8">
      <div className="max-w-md w-full space-y-8">
        <div>
          <div className="flex justify-center">
            <div className="w-12 h-12 bg-primary-600 rounded-lg flex items-center justify-center">
              <span className="text-white font-bold text-xl">B</span>
            </div>
          </div>
          <h2 className="mt-6 text-center text-3xl font-extrabold text-gray-900">
            {t('auth.signInTitle')}
          </h2>
          <p className="mt-2 text-center text-sm text-gray-600">
            {t('auth.or')}{' '}
            <Link
              to="/register"
              className="font-medium text-primary-600 hover:text-primary-500"
            >
              {t('auth.createNewAccount')}
            </Link>
          </p>
        </div>

        <form className="mt-8 space-y-6" onSubmit={handleSubmit(onSubmit)}>
          <div className="space-y-4">
            <div>
              <label htmlFor="email" className="form-label">
                {t('auth.email')}
              </label>
              <input
                {...register('email')}
                type="email"
                autoComplete="email"
                className={`form-input ${errors.email ? 'border-red-300 focus:border-red-500 focus:ring-red-500' : ''}`}
                placeholder={t('auth.enterEmail')}
              />
              {errors.email && (
                <p className="form-error">{errors.email.message}</p>
              )}
            </div>

            <div>
              <label htmlFor="password" className="form-label">
                {t('auth.password')}
              </label>
              <div className="relative">
                <input
                  {...register('password')}
                  type={showPassword ? 'text' : 'password'}
                  autoComplete="current-password"
                  className={`form-input pr-10 ${errors.password ? 'border-red-300 focus:border-red-500 focus:ring-red-500' : ''}`}
                  placeholder={t('auth.enterPassword')}
                />
                <button
                  type="button"
                  className="absolute inset-y-0 right-0 pr-3 flex items-center"
                  onClick={() => setShowPassword(!showPassword)}
                >
                  {showPassword ? (
                    <EyeSlashIcon className="h-5 w-5 text-gray-400" />
                  ) : (
                    <EyeIcon className="h-5 w-5 text-gray-400" />
                  )}
                </button>
              </div>
              {errors.password && (
                <p className="form-error">{errors.password.message}</p>
              )}
            </div>
          </div>

          <div className="flex items-center justify-between">
            <div className="flex items-center">
              <input
                id="remember-me"
                name="remember-me"
                type="checkbox"
                className="h-4 w-4 text-primary-600 focus:ring-primary-500 border-gray-300 rounded"
              />
              <label htmlFor="remember-me" className="ml-2 block text-sm text-gray-900">
                {t('auth.rememberMe')}
              </label>
            </div>

            <div className="text-sm">
              <Link
                to="/forgot-password"
                className="font-medium text-primary-600 hover:text-primary-500"
              >
                {t('auth.forgotPassword')}
              </Link>
            </div>
          </div>

          {error && (
            <div className="bg-red-50 border border-red-200 rounded-md p-4">
              <p className="text-sm text-red-600">{error}</p>
            </div>
          )}

          <div>
            <button
              type="submit"
              disabled={isLoading}
              className="group relative w-full flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-primary-600 hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {isLoading ? (
                <div className="flex items-center">
                  <div className="loading-spinner w-4 h-4 mr-2"></div>
                  {t('auth.signingIn')}
                </div>
              ) : (
                t('auth.signIn')
              )}
            </button>
          </div>

          <div className="mt-6">
            <div className="relative">
              <div className="absolute inset-0 flex items-center">
                <div className="w-full border-t border-gray-300" />
              </div>
              <div className="relative flex justify-center text-sm">
                <span className="px-2 bg-gray-50 text-gray-500">Or continue with</span>
              </div>
            </div>

            <div className="mt-6 grid grid-cols-2 gap-3">
              <button
                type="button"
                className="w-full inline-flex justify-center py-2 px-4 border border-gray-300 rounded-md shadow-sm bg-white text-sm font-medium text-gray-500 hover:bg-gray-50"
              >
                <span className="sr-only">Sign in with GitHub</span>
                <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
                  <path
                    fillRule="evenodd"
                    d="M10 0C4.477 0 0 4.484 0 10.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.029-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0110 4.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.203 2.398.1 2.651.64.7 1.028 1.595 1.028 2.688 0 3.848-2.339 4.695-4.566 4.942.359.31.678.921.678 1.856 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.019 10.019 0 0020 10.017C20 4.484 15.522 0 10 0z"
                    clipRule="evenodd"
                  />
                </svg>
                <span className="ml-2">GitHub</span>
              </button>

              <button
                type="button"
                className="w-full inline-flex justify-center py-2 px-4 border border-gray-300 rounded-md shadow-sm bg-white text-sm font-medium text-gray-500 hover:bg-gray-50"
              >
                <span className="sr-only">Sign in with Google</span>
                <svg className="w-5 h-5" viewBox="0 0 24 24">
                  <path
                    fill="currentColor"
                    d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
                  />
                  <path
                    fill="currentColor"
                    d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
                  />
                  <path
                    fill="currentColor"
                    d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
                  />
                  <path
                    fill="currentColor"
                    d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
                  />
                </svg>
                <span className="ml-2">Google</span>
              </button>
            </div>
          </div>
        </form>
      </div>
    </div>
  )
}
